Recording and reproduction of intelligence signals



5, 1968 R. R. MCDANIEL 3,396,243

RECORDING AND REPRODUCTION OF INTELLIGENCE SIGNALS 2 Sheets-Sheet 1Original Filed March 5, 1965 24 I30 REGULATED SUPPLY 1 I8 2 o y SOURCEOF CORRECTOR INTELLIGENCE-.- umr TO as RECORDED RE GULATED SUPPLY T5 I 1T5 2 /--33'DIFFERENTIAL 3 C 1 AMPLIFIER COMPARATOR umr 348 39 a: 32

NTELUGENCE 4! TRANSDUCER g p AMPLIFIER UNIT 44 uzsmso 1 43 42 48PRESENTATION Ts I T5 2 INVENTOR PASS PASS RAYMOND R. McDAN/EL 3 FILTERFILTER BY 7M ATTORNEYS Aug. 6, 1968 R. M DANIEL Original Filed March 3,1965 2 Sheets-Sheet 2 FIG 4 H6 oscILLAToR FREQUENCY [90 25 KC FM av30-{9Q' 73 M MODULATION UNIT ao- 68 INTELLIGENCE CORRECTOR SOURCEFREQUENCY MODULATION KC FM BY -1-22 UNIT 30 KC OSCILLATOR H4DIFFERENTIAL AMPLIFIER I09 n2 PASS DIscRIMINAToR 30v {90' FILTER PHASEAMPLIFIER coMPARAToR UNIT 30 KC PASS DISCRIMINATCR /90 05 i FILTER TRAPIoa IIo INTELLIGENCE TRANSDUCER INVENTOR.

DESIRED PRESENTATION RAYMOND R. McDAN/EL ATTORNEYS United States Patent3,396,243 RECORDING AND REPRODUCTION OF INTELLIGENCE SIGNALS Raymond R.McDaniel, 317 Cluster Ave., Akron, Ohio 44305 Continuation ofapplication Ser. No. 441,402, Mar. 3, 1965, which is acontinuation-impart of application Ser. No. 755,104, Aug. 14, 1958, nowPatent No. 3,187,114.

This application Sept. 28, 1966, Ser. No. 586,907

7 Claims. (Cl. 179-1003) ABSTRACT OF THE DISCLOSURE The device recordsand reproduces intelligence signals. An intelligence signal is received,corrected and converted into a beam which is focused on a photosensitivematerial. At the same time, a pair of regulated guide signals of a knownvalue are converted to beams and also recorded on the photosensitivematerial on either side of the intelligence signal. The information,thus permanently recorded, can be readily reproduced.

This application is a continuation of my copending application Ser. No.441,402, filed Mar. 3, 1965, now abandoned, which is acontinuation-in-part of application Serial No. 755,104 filed Aug. 14,1958 now US. Patent 3,187,114.

The present invention relates to the recording and reproduction ofintelligence, information or data signals. More particularly, theinvention relates to the use of a novel system permitting recording oflarge quantities of intelligence signals as a variable image onphotosensitive material bounded by tracking images or sensory readingcontrol signals which permit the recorded information signals to bereadily reproduced.

It is an object of the present invention to provide an improved systemfor the conversion of intelligence, information or data signals, such assound, the output of a computer or any occurrence of a detectablephenomenon expressible as an electrical signal, into a permanent recordon a photosensitive material.

As is Well known and conventional in the art, the electron beamgenerated by a cathode ray tube is caused to be deflected by anoscillator or generator. By applying the output of the generator todeflection plates of the CRT, the generated oscillation may control thescanning character of the electron beam in a predetermined manner. Forexample, if the shape of the current curve of the generated cyclicoutput is that of a sawtooth type oscillation, the electron beam in itsscanning movement goes from one end to the other upon a luminescentscreen, during a predetermined scanning period, returning more rapidlyto the initial starting point; the visual indication being a straightline upon the screen. Patent No. 2,485,829 may be referred to for acathode ray tube which is conventionally affected by an oscillationgenerator.

Stored information to be read by the generated electron beam must bephysically made to coincide with such an electron beam as it travels itspredetermined path across its target, in order that the information beeffectively read, as is necessary in the device of Patent No. 2,485,-829. When reproducing information stored on photosensitive material, forexample, the material must be mechanically positioned with respect tothe beam target so as to accomplish the coincidence of the informationand the electron beam. Since reading accuracy depends upon propermechanical positioning of the material, there is actually no existingcharacteristic within the recorded information which inherently andautomatically relates the instantaneous beam reading position to thatposition of the recorded information at any instant, Fur- 3,396,243Patented Aug. 6, 1968 thermore, the beam position as controlled by asignal generator in a conventional device is susceptible to voltagesurges and static interference, for example, which limit thepredictability of successive, instantaneous beam positions.

Accordingly, another object of the invention to avoid the above statedproblem is to provide a cathode ray tube reading device whereby aninstantaneous beam position is a function of the portion of recordedinformation being read as contrasted to the conventional beampositioning described by a cyclic deflection oscillator.

It is a related object to simultaneously record with the variable imageof the intelligence signal a set of tracking or guide signal images sothat a small area of photosensitive material will receive and storelarge quantities of intelligence.

A further related object is to simultaneously record the intelligencesignal image with a set of tracking or sensory reading control signalimages so that the stored information may be readily reproduced.

These and other objects of the invention, as Well as the advantages overprior art systems, will be apparent in view of the following descriptionand drawings.

In the drawings:

FIG. 1 is a block diagram of a system for recording intelligence,information or data signals on a cylinder of photosensitive material;

FIG. 2 is an enlarged representation of a portion of the photosensitivematerial of FIG. 1;

FIG. 3 is a block diagram of a system for reproducing intelligencesignals recorded as in FIG. 1;

FIG. 4 is a block diagram of a modified form of the invention forrecording intelligence, information or data signals with frequencymodulated tracking images on a strip of photosensitive material; and

FIG. 5 is a block diagram of a system for reproducing intelligencesignals recorded as in FIG. 4.

In general, the concept of the invention calls for receiving theintelligence signal from its source and corresting or transforming theintelligence signal into a characteristic signal compatible with thesystem. The characteristic intelligence signal is then converted into abeam of modulated light which is finely focused to record theintelligence signal image on a moving cylinder or strip ofphotosensitive material. Simultaneously with recording the intelligencesignal image, a pair of tracking or guide sensory reading control signalimages are recorded on the photosensitive material. The separate anddistinct tracking signal images are each derived from a regulatedsupply, are converted into beams of modulated light having a constantvalue and are focused one on either side of the intelligence signalimage. After recording the intelligence and tracking signal images, thephotosensitive material is developed in a conventional manner.

The reproduction portion of the system includes a camera tube having alens, a light sensitive mosaic and an electron gun with a beampreferably scanning the mosaic in only one direction, transversely ofthe image bands on the photosensitive material. The cylinder or strip ofphotosensitive material is mounted to move past a flood source of light.The photographic images are focused by conventional adjustment means toconverge through the camera tube lens and impinge upon a mosaic. As theelectron :beam begins to scan the mosaic, the signal output from thecamera tube will correspond to the signal images impinged upon themosaic. On passage from the camera tube, the combined signal images areseparated or resolved. The reproduced intelligence signal image istransmitted to a transducer for conversion into a form for any desiredpresentation. The reproduced tracking image signals are filter-passed toa comparator where the output is the difference of the tracking signalstrengths. This difference signal may be differentially amplified and isapplied to the deflection plates of the camera electron gun to directthe beam toward that point where the tracking signals will be of equalamplitude. When the tracking or sensory reading control signals are ofequal amplitude, the electron beam will be directed at the intelligencesignal image.

Referring to FIG. 1, this embodiment of the invention employs as thephotosensitive material a cylinder or drum of photographic film. Thefilm of cylinder 10 is preferably graticular having an emulsion capableof resolving 8,00015,000 lines per inch. These values are illustrativeonly, and the selection of an actual film composition for cylinder 10 isdeemed within the competence of a person skilled in the art.

The tfilm cylinder 10 is enclosed within the lightproof housing of arecording camera indicated at 12. The camera 12 has a cylindricalmandrel which slips within and carries the cylinder 10. The mandrel 13is driven by suitable mechanical means (not shown) to rotate around andmove longitudinally of the mandrel axis indicated at 14. The rate atwhich the mandrel l3 revolves around its axis primarily determines thefidelity of the intelligence signal image developed on a particularfilm. The rate at which the mandrel 13 moves longitudinally of its axisdetermines the spacing between image bands as established by thefrequency of the images and the desired quantity of images per area offilm, and the rate of axial movement of the mandrel is preferablypreselected to provide sufiicient longitudinal spacing of image 7 bandsto prevent scanning beam overlap or signal interference duringsubsequent reproduction operations as described below.

As an illustration, with a band spacing of of an inch, for a six-inchdiameter cylinder of suitable length and composed of a graticular filmcapable of resolving 12,000 lines per inch, a proper surface speed ofrotation for a characteristic intelligence signal corresponding to 6,000cycle sound would be approximately /2 inch per second. On the samebasis, extreme fidelity for 10,000 cycle sound would require a surfacespeed of rotation at about one inch per second. These illustrations areexemplary only and the physical dimensions of the film cylinder and therate of rotation and longitudinal movement thereof for recording of aparticular intelligence signal are deemed within the competence of aperson skilled in the art.

The camera 12 includes a converging lens 15. The focal point 16 of lens15 is shown as between the lens and the surface of the film cylinder 10.However, the focal point 16 may be located as desired so long as theimage bands impinge on the emulsion of film cylinder 10 as sharplydefined parallel images.

The intelligence, information or data to be recorded, appears as asignal from its source which is indicated at 18. The intelligence signalis preferably transmitted to a corrector unit 20 which may be one ofseveral conventional electrical system components capable oftransforming the intelligence signal to a signal compatible with themodulated light components 22 described below.

The corrector unit 20 may be an amplifier for a weak intelligencesignal. Or, the intelligence signal could be expressed as a harmonic ofone or more basic frequencies, suitably amplified or strengthened asdesired. Alternatively, the corrector unit 20 could include switchingcircuits to selectively transmit the intelligence signals from aplurality of sources such as a battery of computers. Other applicationsof different type corrector units 20 will suggest themselves and so longas the output signal thereof is compatible with the system as a whole,the selection of any particular unit is deemed within the competence ofa person skilled in the art.

It will further be understood that in certain applications, as when theintelligence signal has a pure frequency, the corrector unit 20 could beeliminated or bypassed and the intelligence signal fed directly to themodulated light component 22.

Component 22 expresses the intelligence signal received from theconnector unit 20 as .a beam of modulated light which can be focused toproject at the camera lens 15. Component 22 may be a device of the typedescribed in Lee de Forests Patent No. 2,735,049, issued Feb. 14, 1956,reference being made thereto for a detailed disclosure.

Simultaneously with recording of the variable intelligence signal imageon the film cylinder 10, there is recorded one on either side of thesignal image band, tracking signal images having different and fixedfrequencies. Components 24 and 25 are conventional regulated supplysources for the tracking frequencies. The output signal from eachcomponent 24 and 25 is transmitted to components 26 and 27,respectively. Components 26 and 27 are modulated beam devices of thesame type as component 22.

The frequencies of the tracking signal from sources 24 and 25 must bedifferent from each other and from the basic component of theintelligence signal. As an illustration, the frequencies could be 130cycles per second from source 24 (TS2) and cycles per second from source25 (T51). Or, it could be 150 cycles from source 24 and cycles fromsource 25. The particular tracking frequencies used will be dictatedlargely by the availability of source components and so long as thefrequencies differ from each other and from the basic component of theintelligence signal, the selection of tracking frequencies is deemedwithin the competence of a person skilled in the art.

The film cylinder 10, when developed to produce maximum resolution andgradation, will have a continuously spiraled three-track band, a portionof which is represented in FIG. 2. The amplitude of the intelligencesignal (IS) image may vary as a function of light density. The upper andlower tracking or sensory reading control signal images will each have aconstant density and change rate reflecting their respective amplitudesand different frequencies. The band image representations of FIG. 2 areintended to show a pulsating intelligence signal bounded by pulsatingtracking signals at 80 cycles (TSl) and cycles (TS2).

Referring to FIG. 3, this embodiment of the invention for producing theintelligence, information or data recorded on the film cylinder 10includes a camera tube indicated at 30. The camera tube includes a lens31, a light sensitive mosaic 32 and an electron gun 33, controlled by apair of opposed deflection .plates 34A and 34B, with electron beam 35scanning the mosaic in only one direction. The signal output from themosaic 32 appears at the conventional camera tube output 36.

The film cylinder 10 is mounted on a transparent mandrel 37 which iscontinuously rotated by suitable mechanical means (not shown),preferably at the same rate as the recording mandrel 13 was rotated.Within the mandrel 37 is a flood source of light 38 suitably shutteredto project the band images of a continuously changing longitudinalsegment of film cylinder 10 on an intermediate focusing lens 39. Theband image at lens 39 passes through the camera lens 31 where itimpinges on mosaic 32.

The electron beam 35 is suitably triggered to begin scanning adjacentthe top of mosaic 32 and move transversely (at 90) of each TSl, IS, TS2band image. Beam triggering to begin scanning may be accomplished by anywell-known means for initially and momentarily superpositioning apositive electrostatic voltage on deflection plate 34A; and this may beachieved by manual adjustment of the tube vertical deflection setting orby conventional automatic deflection voltage switching synchronized withthe commencement of downward travel of the longitudinal segment of thephoton beam from light source 38. Suitable beam control circuitry andmodes of operation for triggering beam scanning are disclosed, forexample,

in Basic Electronics, Bureau of Naval Personnel (US. Government PrintingOflice, 1955), pp. 612-615 and Modern Oscilloscopes and Their Uses, J.H. Ruiter, Jr. (Rinehart Books, Inc., N.Y. 1953), pp. 31-33. As the beam35 impinges upon the mosaic 32, the signal output at 36 will vary inaccordance with the degree and rate of change of lightness or darknessof the band images on the mosaic, the beam width being adjusted to thepredetermined width of the band images by conventional beam focus orconvergence setting means. The signal output at conventional camera tubeoutput 36 is preferably amplified by conventional component 40 with theoutput appearing at 41,42, 43 and 44.

' Component 45 is a conventional trap for the tracking signals (T81 andTS2) and permits only the intelligence signal (IS) to pass. Theintelligence signal passes through component 45 and is transmitted to atransducer unit 46. The transducer unit 46 may be one of severalconventional electrical system components capable of transforming theintelligencesignal to the form required for the desired presentation.

The transducer unit 46 could be a speaker for sound presentation, anoscilloscope for visual presentation or an input component of acomputer. Other applications of different type transducer units 46- Willsuggest themselves and the selection of any particular unit to presentthe intelligence signal is deemed within the competence of a personskilled in the art.

Components 47 and 48 are conventional band pass filters for the trackingof sensory reading control signals. Filter 47 is connected to lead 43and if T81 is 80 cycles, would permit only an 80 cycle signal to pass.Filter 48 is connected to lead 44 and if TS2 is 130 cycles, would permitonly a 130 cycle signal to pass.

From the pass filter components 47 and 48, the separate tracking signalsare simultaneously transmitted to a conventional amplitude comparatorunit 50. The output signal of component 50 is the difference of thetracking signals strength. This difference signal is preferablytransmitted through a conventional differential deflector amplifier 52to control the voltages on vertical deflection camera plates 34A and34B, with horizontal deflection plates 34C and 34D having a constantvoltage impressed thereon for beam centering, if desired.

Assuming that the upper tracking signal image (TSl) is 80 cycles and thelower tracking signal image (T82) is 130 cycles, when the electron beam35 begins to scan the mosaic 32 as described above the 80 cycle signalwill be strong and the 130 cycle signal will be weak. The severalcomponents following amplifier 40 will then react to control thevoltages on plates 34A and 34B so that the electron beam 35 is deflectedto the point where the tracking signals are of equal amplitude. When thetracking signals are of equal amplitude, the electron beam will bedirected at an initial portion of the intelligence signal image on themosaic 32. As the mandrel 37 rotates, the band image on the mosaic willchange position, the portion of the T81 image impinged upon by beam 35at mosaic 32 gradually increasing, the portion of the TS2 image beingimpinged upon by the beam 35 gradually decreasing, thereby providing aset of tracking signals whose strength difference gradually increases,so that electron beam will be deflected to remain on the intelligencesignal image, thus scanning the entire surface of the film cylinder andreproducing all of the intelligence recorded thereon.

Referring to FIG. 4, this embodiment of the invention employs as thephotosensitive material an elongated strip 60 of photographic film. Thefilm of strip 60 has qualities the same as the film of cylinder 10. Thefilm strip 60 is connected to suitable reels 61 driven by mechanicalmeans (not shown) within a recording camera 62 similar to camera 12. Therate at which the film strip moves past a camera lens 65, similar tolens 15, determines the fidelity of the intelligence signal imagedeveloped on a particu lar film.

The intelligence, information or data to be recorded appears from source68 and is preferably transmitted to a corrector unit 70, similar to unit20. From unit 70, the intelligence signal is transmitted to a modulatedlight device 72, of the same type as component 22, which is focused toproject at the camera lens 65.

The tracking or sensory reading control signals for this embodiment arederived from a conventional dual output regulated supply source 73. Thesignal appearing at 74 is transmitted to a conventional frequencymodulation unit 75. The unit 75 also receives a signal from aconventional oscillator 76. The other signal from source 73 appearing at77 is also transmitted to a conventional frequency modulation unit 78.The unit 78 also receives a signal from a conventional oscillator 79'.

As shown, the source 73 generates 30 cycle current. The output at 73 maybe a 30 cycle signal with a leading phase of The output signal at 77 mayhave a lagging phase of 90. The oscillator 76 may supply a 25 kc. signaland oscillator 79 may supply a 30 kc. signal, to modulator units 75 and7-8 respectively. These frequencies and phase angles are a matter ofchoice dictated largely by the availability of components and so long asthe signals from the modulator units 75 and 78 differ from each otherand from the basic component of the intelligence signal, their selectionis deemed within the competence of a person skilled in the art.

The 25 kc. signal frequency modulated by 30 cycles of plus 90 degreesfrom unit 75, and the 30 kc. signal frequency modulated by 30 cycles atminus 90 degrees from unit 78, are simultaneously transmitted tomodulated beam devices 81 and 82 respectively, of the same type ascomponents 22 or 72. The beams of modulated light are projected atcamera lens 65 for simultaneous recording with the variable intelligencesignal image on the moving film strip 60.

Referring to FIG. 5, this embodiment of the invention for reproducingthe intelligence, information or data recorded on a developed film strip60 includes a camera tube indicated at 90. The camera tube includes alens 91, a light sensitive mosaic 92, an electron gun 93 and adeflection yoke 94 for the electron beam 95. The signal output from themosaic 92 appears at 96.

The film strip 60 is connected to suitable reels 97 which are driven bysuitable mechanical means (not shown), preferably at the same rate asthe recording reels 61. Behind the film strip 60 is a flood source oflight 98 suitably shuttered to project the band images of a continuouslychanging segment of the film strip on an intermediate lens 99. The bandimage at lens 99 passes through the camera lens 91 where it impinges onmosaic 92.

The electron beam is suitably triggered to begin scanning from the topof mosaic 92 and move transversely across an image band. As the beam 95impinges upon the mosaic 92, the signal output at 96 will vary inaccordance with the degree and rate of change of lightness or darknessof the band images on the mosaic. The signal output at 96 is preferablyamplified by conventional component 100 with the output appearing at101, 102, 103 and 104.

Component 105 is a conventional trap for the tracking or sensory readingcontrol signals and permits only the intelligence signal to pass to atransducer unit 106. The transducer unit 106 may be similar to unit 46and presents the intelligence in a desired form.

Components 107 and 108 are conventional band pass filters for thetracking signals. Filter 107 is connected to lead 103 and permits onlythe 25 kc. signal frequency modulated by 30 cycles at plus 90 degrees topass. Filter 108 connected to lead 104 permits only the 30 kc. signalfrequency modulated by 30 cycles at minus 90 degrees to pass.

From the pass filters 107 and 108, the 25 kc. and 30 kc. signals aresimultaneously transmitted to conventional discriminator components 109and 110 respectively. The

discriminator unit 109 passes only the 30 cycle at plus 90 degreessignal. The discriminator unit 110 passes only the 30 cycle at minus 90degrees signal.

The output signals from units 109 and 110 are simultaneously transmittedto a conventional phase comparator unit 112. The output signal of thecomparator unit is the difference of the tracking signals strength. Thisdifference signal is preferably transmitted through a conventionaldifferential deflection amplifier 114 to the control yoke 94 on theelectron gun 93.

When one tracking or sensory reading control signal is stronger than theother, as when the electron beam has drifted away from the intelligenceimage on mosaic 92, the difference signal from the amplifier 114 willcause yoke 94 to defiect the electron beam until the output of the phasecomparator unit 112 is zero. Thus, the electron beam 95 will bedeflected to remain on the intelligence signal image while the filmstrip 60 is continuously moving.

The above disclosure presents various embodiments of the invention byway of explaining the concepts involved. However, the invention shouldnot necessarily be limited by the specific components described and thescope thereof should be determined by the appended claims.

What is claimed is:

1. A precise positioning system for an energy beam comprising, targetmeans, means for projecting an energy beam in an initial directiontoward said target means, means for producing movement between saidinitially directed beam and said target means, and dynamic beam trackingmeans for producing coincidence of the beam with a preselected portionon said target means, said beam tracking means including a set ofsensory control means positioned in the path of the beam for applying tothe beam identifiable characteristics representative of the beamsposition on said target means, further including a set of trackingsignals having an electrical characteristic derived from saididentifiable characteristics applied to the beam, and still furtherincluding means for supplying to said movement means control electricitywhose values are functionally dependent on said derived electricalcharacteristic.

2. A system as in claim 1 wherein said set of sensory control means ispositioned adjacent to a select portion on said target means forapplying to the beam identifiable characteristics representative of thebeams position on said select portion.

3. A system as in claim 1 wherein said target means is a photo-sensitivebody having said set of sensory control means formed thereon by acorresponding set of sensory control images contained in a photon beampro jected thereon.

4. A precise positioning system for an energy beam comprising, targetmeans, means for projecting an energy beam in an initial directiontoward said target means, means for producing movement between saidinitially directed beam and said target means, and dynamic errorcorrection means for opposing inaccurate movement between the beam and apreselected portion on said target means, said error correction meansincluding a set of tracking signal means positioned in the path of thebeam for applying to the beam identifiable characteristicsrepresentative of said inaccurate movement, further including a set ofsensory control signals having an electrical characteristic derived fromsaid identifiable characteristics-applied to the beam, and still furtherincluding means for supplying to said movement means control electricitywhose values are functionally dependent on said derived electricalcharacteristic.

5. A system as in claim 4 wherein said set of tracking signal means ispositioned adjacent to a select portion on said target means forapplying to the beam identifiable characteristics representative of thebeams divergence from said select portion.

6. A system as in claim 4 wherein said target means is a photosensitivebody having said set of tracking signal means formed thereon by acorresponding set of tracking signal images contained in a photon beamprojected there- 7. In a system for positioning an energy beam preciselyon its target, means for generating and projecting on the target surfacea composite photon beam having a plurality of control signal imagescontained therein, said image plurality including a first speciescontrol signal image compatible with the system for controlling themovement of an energy beam in a first predetermined direction and asecond species compatible control signal image, localized adjacent saidfirst species image, for controlling said energy beam movement in asecond direction opposite said first direction, means for producingmovement of said projected adjacent images across said target surface toengage the beam and thus apply identifiable characteristics thereto inthe form of distinct sensory reading control signals, and dynamic beampositioning means for repositioning said energy beam precisely on thatselect portion of the target surface between said two adjacent imagesmoveably projected on said target surface, said dynamic positioningmeans including, conventional beam signal output means, means forseparating from said output means a set of control signals derived fromsaid first and second species of control signal images on said targetsurface, means for analyzing or comparing the strengths of said derivedcontrol signals and for providing a resultant or difference signalhaving an electrical characteristic derived from said energy beamsposition on said select target portion, and means for supplying to anenergy beam repositioning means control electricity whose values arefunctionally dependent on said derived electrical characteristic.

References Cited UNITED STATES PATENTS 2,307,212 1/1943 Goldsmith 3l521X 2,790,107 4/1957 Bradley 315-21 X 2,855,540 10/1958 Hoover et a1.315-21 X 3,134,044 5/1964 Auvil 3l58.5 3,137,768 6/1964 Mullin 1786.63,263,031 7/1966 Welsch 340174.1

RODNEY D. BENNETT, Primary Examiner.

B. L. RIBANDO, Assistant Examiner.

Disclaimer 3,396,243.-Raym0nd R. McDaniel, Akron Ohio. RECORDING AND BE-PRODUCTION OF INTELLIdrENOE SIGNALS. Patent dated Aug. 6, 1968.Disclaimer filed Apr. 25, 1968, by the inventor.

Hereby disclaims the terminal portion of the term of the patentsubsequent to June 1, 1982.

[Official Gazette October 8, 1968.]

